I hope you like this because it was a headache to keep a good balance between the cost of the upgrades, the scraps that an average player can collect from the current level, and the level that comes shortly, and the exponential increment of the prices per purchase, without making it impossible for a player to complete all upgrades in a short or long amount of time. And by the way, if you are wondering if the upgrades are going to be preserved even if I play from my browser, the answer is YES, THE BROWSER WILL CREATE A DATABASE FOR THE GLOBAL DATA THAT IS SAVED FROM THIS GAME.